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International Conference on Cryptography, Security and Privacy (CSP)

Quantum Key Distribution and Security Studies

Jianzhou Mao, Guobin Xu, Eric Sakk, Shuangbao Paul Wang

Published Apr 1, 2023• 5 citations
Publisher

Abstract

The current development of quantum computing threatens the security of conventional encryption algorithms such as RSA. In recent years, Quantum Key Distribution (QKD) has introduced to the world of information security a viable method that is anticipated to provide security protection against the threat of quantum computing. In this paper, we investigate the protocols of the QKD system. Next, we focus on an experimental study of quantum key distribution. A physical QKD system is leveraged to assist us in further investigating quantum key distribution processes. In our study, an eavesdropper was evaluated to analyze the impact on the QKD processes. In the experimental study results, the difference in key generation, exchange, and error rates between normal and attack scenarios can be observed.

DOI
10.1109/csp58884.2023.00033

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The current development of quantum computing threatens the security of conventional encryption algorithms such as RSA. In recent years, Quantum Key Distribution (QKD) has introduced to the world of information security a viable method that is anticipated to provide security protection against the threat of quantum computing. In this paper, we investigate the protocols of the QKD system. Next, we focus on an experimental study of quantum key distribution. A physical QKD system is leveraged to assist us in further investigating quantum key distribution processes. In our study, an eavesdropper was evaluated to analyze the impact on the QKD processes. In the experimental study results, the difference in key generation, exchange, and error rates between normal and attack scenarios can be observed.
The increasing number of cyber threats and the approaching development of quantum computing demand a critical review of existing cryptographic approaches. The goal of this work is to evaluate the security and practicality of utilizing Quantum Key Distribution for secure communications. QKD utilizes the laws of quantum mechanics to provide a secure and unbreakable method for exchanging information. Protocols like BB84 are resistant to threatening attacks from both classical and quantum adversaries. The methodology utilizes simulated models and quantum communication toolkits to study critical characteristics such as key generation speed, QBER, latency and scalability. Performance of QKD is compared to that of classical schemes such as RSA-2048, ECC-256 and AES-256. Results reveal that although QKD provides unparalleled theoretical security, its deployment has notable obstacles such as intricate infrastructure, restrictions on distance and elevated latency. Our study reveals that optimizing the interplay between security and practicality in QKD deployment can yield a highly effective safeguard for next-generation communication networks.
Cryptography is crucial to protect sensitive data. Traditional cryptography relies on mathematical difficulty to secure valuable data against intruders. However, with the rise of quantum computers, these assumptions are threatened as quantum computers can process information much faster. The security models need to be upgraded to withstand quantum computers. RSA and ECC, two common asymmetric cryptosystems, have been upgraded using post-quantum cryptography (PQC). Another solution might be to leverage the principles of quantum mechanics to ensure secure communication. The most common application of quantum cryptography is quantum key distribution (QKD), which solves the key exchange problem using quantum physics, complementing conventional cryptographic techniques by enabling secure key generation, while classical methods remain necessary for authentication and protocol implementation. QKD is secure in theory, but practical implementations often differ from theory due to imperfect devices. An intruder can find loopholes and vulnerabilities to attack the QKD systems and jeopardize its security. In this thesis, current knowledge of these attacks has been reviewed and simulated on two different QKD protocols. The simulations highlight the importance of researching the attacks and implementing countermeasures.
Quantum computing poses significant threats to conventional cryptographic techniques such as RSA and AES, motivating the need for quantum secure communication methods. Quantum Key Distribution (QKD) offers information theoretic security based on fundamental quantum principles. This paper presents a simulation-based analysis of well-known QKD protocols, namely BB84, B92, and E91, using the IBM Qiskit framework. Realistic quantum channel effects, including noise, decoherence, and eavesdropping, are modeled to evaluate protocol performance. Key metrics such as error rate, secret key generation, and security characteristics are analyzed and compared. The study highlights practical challenges in QKD implementation, including hardware limitations and channel losses, and discusses insights toward scalable and robust quantum communication systems. The results support the feasibility of QKD as a promising solution for secure communication in the quantum era.
The emergence of quantum computing poses significant risks to conventional network security, prompting researchers to focus on developments in quantum cryptography, particularly Quantum Key Distribution (QKD).According to research, it has been found that traditional security methods, like RSA encryption, could potentially be at risk from quantum algorithms.On the other hand, quantum cryptography is a field of study that leverages the principles of quantum mechanics to improve the security of communication.One of the techniques used in quantum cryptography is Quantum Key Distribution (QKD), which makes use of the unique properties of quantum particles such as photons to securely distribute encryption keys and detect any potential eavesdropping attempts, thanks to the uncertainty principle.Nevertheless, the integration of QKD into current network infrastructures poses significant challenges due to the required technological advancements.This study offers a comprehensive analysis of the fundamental principles underlying quantum cryptography, the obstacles that arise during its implementation, and its potential prospects for protecting against the risks posed by advancements in quantum computing.Furthermore, this study delves into the potential consequences of these technological advancements across different industries and emphasizes the need to create algorithms that can withstand quantum attacks to guarantee strong data security in the age of digitalization.
The accelerating development of quantum computing capabilities poses an unprecedented challenge to conventional encryption methodologies that currently underpin global digital security infrastructure. Classical cryptographic systems, including widely adopted standards such as RSA and AES, derive their security from the computational intractability of specific mathematical problems, a foundation that quantum algorithms threaten to fundamentally undermine. This research presents a comprehensive investigation into the practical implementation of Quantum Key Distribution as a transformative approach to establishing unconditionally secure communication channels. Through experimental deployment of the BB84 protocol augmented with advanced quantum error correction and privacy amplification techniques, we systematically evaluate the performance characteristics and security guarantees of QKD in realistic network environments. Our experimental framework achieves a secure key generation rate of 2.5 megabits per second while maintaining an average quantum bit error rate of 3.2 percent, demonstrating the practical viability of quantum-secured communication. The implementation exhibits exceptional eavesdropping detection capabilities with a 98.5 percent success rate in identifying unauthorized interception attempts. Comparative security analysis reveals that QKD-based encryption reduces vulnerability to brute-force attacks by 65 percent when contrasted with classical encryption standards. The integration of lattice-based post-quantum cryptographic algorithms provides an additional security layer against store-now-decrypt-later attack strategies. These findings substantiate the position of Quantum Key Distribution as a cornerstone technology for next-generation cybersecurity frameworks, offering robust protection against both current threats and the anticipated capabilities of large-scale quantum computers.
The inception of quantum key distribution (QKD) empowered the communication networks with unconditional security because of the unique characteristics of quantum mechanics. Since QKD genesis, various protocols have been proposed to augment the feasibility of its real-world implementation and to overcome the inherent vulnerabilities of communication channel. In the past several years' studies emphasize the significance of QKD in the field of secure communication, because it can counter critical attacks quite effectively. In this paper, we present in-depth security analysis of the notable QKD protocols which encompasses from their theoretical assertions to their practical implementation factors and simulation outcomes.